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A critical evaluation of coastal erosion in Rio Grande do Sul, Southern Brazil Anais da ABC (AABC)
Dillenburg,Sérgio R.; Esteves,Luciana S.; Tomazelli,Luiz J..
Evidences of coastal erosion in Rio Grande do Sul have been obtained by three methods: (a) analysis of the long-term morphodynamics and stratigraphy of coastal barriers, (b) annual shoreline mapping using the Differential Global Positioning System (DGPS), and (c) local beach profile measurements. The first method reflects coastal erosion as continuity of the geological evolution in the last 5 ka, taking place mainly along the southern half of gentle coastal projections. The second method represents a shorter temporal scale and indicates that approximately 80% of the coast is eroding. Beach profiling has been measured in very few places that are distant from each other since the early 1990s; consequently, their results reflect local and very short time...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coastal evolution; Quaternary; Shoreline changes; Coastal barriers; Sediment budget.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000300014
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Beach ridges, foredunes or transgressive dunefields? Definitions and an examination of the Torres to Tramandaí barrier system, Southern Brazil Anais da ABC (AABC)
Hesp,Patrick A.; Dillenburg,Sergio R.; Barboza,Eduardo G.; Tomazelli,Luiz J.; Ayup-Zouain,Ricardo N.; Esteves,Luciana S.; Gruber,Nelson L.S.; Toldo-Jr.,Elirio E.; Tabajara,Luiz L.C. de A.; Clerot,Luiz C.P..
Many prograded barriers and some dunefields in theworld have been termed 'beach ridge' plains, but the actual genesis of the 'ridges' is often unknown. Use of the terms, berms, beach ridges and foredunes is also confusing in the literature because their definitions are highly variable and are commonly used interchangeably. Thus, the formation and definition of sand berms, beach ridges and foredunes is briefly reviewed. Beach ridges are re-defined as entirely wave formed deposits which are most commonly formed during high wave conditions and/or elevated water levels (e.g. storm surges). Foredunes are formed by aeolian sand deposition in vegetation on the backshore. Some dunefields in Brazil have been called beach ridge plains when they are, in fact,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beach ridges; Coastal barriers; Transgressive dunefields; Holocene; Southern Brazil.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652005000300010
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